Spindle motor and hard disk drive device

Abstract

A spindle motor included in a hard disk drive device using a heat assisted magnetic recording method as a magnetic recording method includes a plurality of components made of metal, a rotor magnet includes a main body part and a coating film covering a surface of the main body part, and at least one of a first pore exposed to the surface and a second pore exposed to a surface of the coating film is filled with a resin material.

1 . A spindle motor provided in a hard disk drive device using a heat assisted magnetic recording method as a magnetic recording method, the spindle motor comprising:
 a plurality of components made of metal, wherein   at least one of the components comprises a main body member and a coating film covering a surface of the main body member, and   at least one of a first pore exposed to the surface or a second pore exposed to a surface of the coating film is filled with a resin material.   
     
     
         2 . The spindle motor according to  claim 1 , wherein the resin material is filled in the first pore. 
     
     
         3 . The spindle motor according to  claim 1 , wherein the resin material is filled in the second pore. 
     
     
         4 . The spindle motor according to  claim 1 , wherein the resin material is an acrylic resin. 
     
     
         5 . The spindle motor according to  claim 1 , wherein a viscosity of the resin material before being cured is equal to or greater than 2 mPa·s and equal to or less than 50 mPa·s. 
     
     
         6 . The spindle motor according to  claim 1 , wherein the coating film is an overbaked electrodeposition coating film. 
     
     
         7 . The spindle motor according to  claim 1 , wherein the main body member is any one of a rotor magnet, a stator core, a rotor hub, a shaft, a sleeve, a pivot post, and a voice coil motor. 
     
     
         8 . The spindle motor according to  claim 7 , wherein the main body member is a rotor magnet. 
     
     
         9 . The spindle motor according to  claim 8 , wherein the rotor magnet is a bond magnet. 
     
     
         10 . A hard disk drive device using a heat assisted magnetic recording method as a magnetic recording method, the hard disk drive device comprising:
 the spindle motor according to  claim 1 .